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Asnnnn r. manoir, or GLAREMONT, Naw HAMPSHIRE.

Letters Patent No. 75,834, dated March 24, 1868.

IMPROVEMENT 1N saw-MILLS.

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TO ALL WI-IOM IT MAY'CONCERN:

Be it knowii that I, ASHBEL P.BARLOw, of the townof Claremont, in the county of Sullivan, and State of New Hampshire, have invented a new, and useful Improvement in Saw-Mills, also an improved feed-works, called a reversible rotary feed, and a supporting-roll; and I do hereby declare that the following is a full and eiiact `description thereof, referencevheing had to the accompanying. drawings and to the letters of reference marked thereon. i

Figures 1 l? are detached views, showing an arrangement of boxes for holding lubricating-materials.

Figure 2 is a similar view of one of the perforated double inclined slides.

Figures S 3 represent a rear elevationv and a vertical sectional view of my improved supporting-roller.

Figures 4 4 show a rear elevation and a vertical longitudinal section of the mill, representing lthe arrangement of my improved feed-works; and

Figure 5 is aplan view of so'me of the parts hereinafter referred to. i

My invention consists in a novel construction of adjustable supporting-roll, and in the construction and arrangement ofparts of the feed-works, `as hereinafter described. A A

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings. l l

The arrangement'of lubricatingboxes, shown in figs. 1,1, and 2, is described in another application of even date herewith, and need not be further described here than by reference to the drawings.

A, iigs. 3 3, represents a base-plate or frame, provided with lugs or uprights A, which aiord bearings for a horizontal pivot, A?, on which a. slotted frame, cl, is mounted, in such manner-ias to permit it to be turned in one direction from -its vertical position to thehorizontal position represented in dotted lines, iig. 3". A lip or shoulder, cZ, in connection with a shoulder or lug on the base-plate, prevents said frame from being turned beyond a vertical position in the opposite dircction. ee represent adjustable uprights, or an adjustable frame, the lower ends of which embrace the slotted pivoted frame d, and are united by a horizontal bar or clamping- 4 bolt, c, while the upper ends a'ord bearings for a horizontal rol-ler, a. The bar, c, connecting the lower 'ends of theuprights c passes through Vthe slots in framed, and is adjustable therein, for varying the height of the' roller a', the adjustment being ell'ected by means of an uprightadjusting-screw,j; connected at its lower end to bar c, and at itsupper end passing through the top bar of frame, and adjusted or set in the desired relation thereto,l by means of one or more adjusting-nuts, in a manner that will be readily understood, and' as represented in the drawings, iigs.,3 3". ff are sliding bolts, arranged underneath bar c, and resting'their enlarged upper ends against said bar, and upon a horizontal follower, c', the lower ends of said bolts passing through a lower. bar of frame d, and beingguided and steadicd in their movements thereby. Spiral springs f2, surrounding the bolts f, are arranged between the follower c and the lower frame-bar, and serve tokeep the supportingroller` up toits work, while at th'csame time they-allow it to yield under a greater pressure or weight than that to which the roller is adjusted or adapted.

The function and the operation of this adjustable supporting-roller will be readily understood. It is designed to be located (as shown in dottedred lines, fig. 42) near the saw, and to aiford- Van intermediate support to the` log duringthe operation of sawing, of such construction a's to be readily adjusted thereto, and Vat the same time vadapted to turn down and out of the way during the operation of gigging back. h, fig. 4, represents' a horizontal shaft, provided with a pulley, through which motion is communicatedto the shaft, by means of a belt passing over said pulley, and over a corresponding pulley ou the pit or drivingshaft V. Shaft ,7' is mounted in suitable bearings or boxes q g2, and is provided at one end with` a frictionplate or disk, z', which rotates in contactwith a similarfrictionwheel or disk, k, onthe-verticalshaft j, the uppcrend of which is-armed with a bevel-pinion Z, which gears into bevel-wheel Z', the horizontal shaft of the said wheel Zlbeing provided with a pinion or spur-wheel or wheels, which engage with racks on the saw-carriage, and impart the necessary forward and-backward movements thereto, as hereinafter described The shaft 7 1/ is adapted to receive end play in its bearings, and the box or bearing q, at. the end opposite-theLfriction-plate orwheel z',`is elongated beyond the end of the shaft toreceive a spring, of any suitable hind or construction, such as rubber or. coiled wire, arranged between plates or washers 72, the tension or pressure of said. spring being adjusted by means of a set or temper-screw, t, as shown in fig. 4. By this arrangement the friction-plate z' is held at all times in contact with the plate or wheel 7c, and with any required force.

I mis apivoted step er box, in which the end of the upright shaft j is placed or stepped, by means of the vibration of which the necessary movement of the upper end of said shafty', for throwing the pinion Zout of and into gear with bevel-wheel Z', is provided for. The frietion-wheel is placed loosely on the shaftj, or in suchrnanner as to be capable of sliding freely thereon, while at the same time it is prevented from turning on said shaft by means of an elongated spline, shown at n., fig. 4. In the hub of wheel c is a groove, in which one end of a lever, r, works, and by means of which wheel 7c is adjusted up o'r down on its shaft and over the face of disk z', in -the manner represented in figs. 4 4, for the purpose of giving a faster or slower or a reversed motion to the friction-wheel 7c, its shaft j, and through them, and the arrangementof gearing above described, to the carriage and its load. i

The arrangement of spring and temper-screw, instead of being nt'the end of the horizontal shaft lr, as abeve described, may be made at the foot of the vertical shaft, se as to act on pivot-box m, as shown by the drawing: and. if preferred, weights may be employed instead of the springs, so arranged as to give an equal pressure and still yielding and allowing the friction-wheel to pass over the surface of the friction-plate unimpedcd, and keep the surface smooth and free from bellows, or, if it becomes so, that the pressure may be equal at all times, so that the friction-wheel would keep moving. A wooden or iron spring Acould be used in the same way and pro-` duce the same effect.

I am aware that feeding the log to the saw simply by friction is old, but I believe the act of passing the cent're on the frictionplat`e withv the friction-wheel, whereby a reversed motion is given, so that I can gig the carriage back as well as forward, and as fast as I may wish, byA keeping the friction-whcel near the upper or lower edge of the friction-plate, is new. Attaching a spring or weight to the end ofthe horizontal shaft 71, or te the box of the upright shaftj, by which I am enabled to change the centres, is also new; otherwise I should not be enabled to dose, as the friction-plate has to be so large that I could not get an equal bearing from top to bottom;` consequently the friction-wheel 7c would slip on friction-plate z' and stop the motion of the carriage.

The advantages gained by this invention are as follows Ifirst, I am enabled to build a rotary feed-werks 'for about one half the expense of any other way'that IA have yet seen, and it is'so simple that it is not easy to get out et" repair. Second, by using my adjust-ment or springs at the end of the horizontal or upright shaft, I am enabled to avoid allbreakages ot' any ofthe feed-works, for should the carriage become fast by any means,

the spring allows the friction-wheels to separate and'stop the carriage. I use but one belt, which is attached to the pulley u on the horizontal shaft 7L, and to the pulley on the pitrnan-shaft, as shown at u', which saves power as well as expense. A I

I will new describe my reversible safety-trip, as shown at figs. 5 and 6, by which all accidents are guarded against while gigging back the log, as is often the case when gigging back fast, by throwing the log oil' the carriage or head-block, causing much trouble, as well as endangering the saw or rnulcy-heads. Ily this simple device all danger is avoided, and is one ofthe essential parts of this feed-works.

Its construction is as follows: A straight bar of iron or wood is used, with the end next the mcshing-ievcr a little concaved or hollowed out, so as to prevent the lever from slipping off before the hook or catch catches it to throw it out of mesh. This lever w is pivoted to the floor ofthe mill, near the carriage, as shown at iig. (i. It is kept in a straight line, the end toward the carriage, by means of a spring orsprings, as shown at figs. 5 and 6, either' by having one spring pass directly through the lever and fastened to thel floor, or by means'o' tno springs, one on either side, s o arranged as to keep the lever in position, or bring it back in position when it is knocked out by thc'hooks or catches as they pass back and forward in the gigging and feeding operation. l

:u z show catches or hooks, one fastened to the carriage, as shown at fig. 4, the other is fastened to the head-block, as shown at 1j in .the same figure. The reason for fastening it to the head-block is that it may always' be adjusted to any length of log, or, rather, that it may adjust itself, which will be readily seen to be the case.

I do not claim the trip as'a safeguard inA feeding the log up, as it is an old device; but

What I claim as new, and desire to secure by Letters Patent, is-

1. |lhc pivoted frame d, in combination with the adjustable uprights c, roller a, and clamp-screw or bar f, constructed and operating substantially as described.

2. In combination with the above device, I claim the adjusting-screw with its controlling nuts, follower c. and slide bolts f1, surrounded by coiled springs, al1 constructedand arranged to operate as described.

3. The upright shaftj, friction-plate 7:, pivoted box m, revolving. plate z', shaft. 71., and its box, with pla-tes, spring, and temper-Screw, in combination with pivoted lever 1' and slotted lever 7", all arranged to operate in the manner substantially as described.

4. The catches or trips a: z on the carriage, in combination with the lever w and springs, levers, and shaft. j, all operating in the manner as described. I

ASIIBEL I. BARLOW: Witnesses:

ALEX. MAnoN. 

